The international shipping industry is responsible for transporting approximately 90% of world trade, making ship safety one of the most important aspects of transportation. Installing predictive maintenance systems on ships is a technology that is not yet widespread, and its high price tag makes it unaffordable for many small and medium-sized enterprises(SMEs). As a result, many shipping companies are busy repairing ship defects that are discovered too late and are always at risk of falling into extreme additional costs. My practice partner developed a corresponding web application for this purpose, and although no technical problems were found during the more than one-year testing phase, the fact that the program was developed without the involvement of a user experience(UX) designer led to criticism from users about the cluttered information categorization and the unfriendly logic of the system"s operation. Therefore, in this study, I addressed this issue by experimenting with user behavior based on the principles of human-centered design (HCD) and user habits. It also shows that UX designers need to have the ability to collaborate on interdisciplinary projects alone.